package com.example.tests;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

public class GroupDataGenerator {
	public static void main(String[] args) throws IOException {
if (args.length < 3 ){
	System.out.println("Please specify parameters: <amount of test data> <file> <format>");
	return;
}

int amount = Integer.parseInt(args[0]);
File file = new File(args[1]);
String format = args[2];

List <GroupData> groups = generateRandomGroups(amount);
if ("csv".equals(format)) {
	saveGroupsToCsvFile(groups, file);
}
else if ("xml".equals(format)) {
		 saveGroupsToXmlFile(groups, file);
		
	}
else {
	System.out.println("Unknown format" + format);
	return;
}
}

	private static void saveGroupsToCsvFile(List<GroupData> groups, File file) throws IOException {
		//saveGroupsToCsvFile(groups, file);
		FileWriter writer = new FileWriter(file);
		 for (GroupData group : groups) {
			 writer.write(group.getName() + "," + group.getHeader() + "," + group.getFooter() + "\n");
		 }
		writer.close();
	}

	private static void saveGroupsToXmlFile(List<GroupData> groups, File file) {
		saveGroupsToXmlFile(groups, file);
	}

	public static List<GroupData> generateRandomGroups(int amount) {
			List<GroupData> list = new ArrayList<GroupData>();
			for (int i = 0; i < amount; i++) {
				GroupData group = new GroupData().withName(generateRandomString())
						.withHeader(generateRandomString())
						.withFooter(generateRandomString());
				list.add(group);
			}
			return list;
	}

	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
			return "";
		} else {
			return "test" + rnd.nextInt(9999999);
		}
	}
}